How to update data in a embedded child element in mongodb?

@arnoldo.moen 

To update data in an embedded child element in MongoDB, you can use the dot notation in combination with the $set operator. Here's an example of how you can update the data in an embedded child element:

Suppose you have a collection called users with documents like this:

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{
  "_id": 1,
  "name": "John Doe",
  "address": {
    "street": "123 Main Street",
    "city": "New York"
  }
}

To update the city in the address field for the user with _id 1, you can use the following update operation:

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db.users.updateOne(
  { "_id": 1 },
  { "$set": { "address.city": "Los Angeles" } }
);

After running this operation, the document will be updated to:

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{
  "_id": 1,
  "name": "John Doe",
  "address": {
    "street": "123 Main Street",
    "city": "Los Angeles"
  }
}

This is how you can update data in an embedded child element in MongoDB using the dot notation and the $set operator.